<h2>C is the correct answer!</h2><h3></h3><h3>2/5</h3><h3>9/?</h3><h3></h3><h3>2 x ? = 9</h3><h3>9 ÷ 2 = 4.5</h3><h3>2 x 4.5 = 9</h3><h3></h3><h3>5 x 4.5 = <u>22.5</u></h3>
Answer:
<u>The principal of the investment is $ 500</u>
Step-by-step explanation:
1. Let's review the information given to us to answer the question correctly:
Interests = $ 60
Interest rate = 12% annually = 0.12
Time = 1 year
2. Find the principal.
Let's use the formula given:
Interests = Principal * interest rate * time
Replacing with the real values, we have:
60 = Principal * 0.12 * 1
0.12 * Principal = 60
Principal = 60/0.12
Principal = 500
The answer is 72 because 604-72=532 and 532+72=604
Answer:
x = - 7
Step-by-step explanation:
8x - 2 = -9 + 7x (add 2 to both sides)
8x - 2 + 2 = -9 + 7x + 2
8x = 7x - 7 (subtract 7x from both sides)
8x - 7x = 7x - 7 - 7x
x = - 7
9514 1404 393
Answer:
Step-by-step explanation:
If find that "substitution" works well for "mixture" problems like this. Usually, you will want to substitute for the lower-priced item, so that you're solving for the number of higher-priced items.
Let "a" and "k" stand for the number of adult and kid tickets, respectively.
a + k = 54 . . . . . . total number of tickets sold
8a +5k = 360 . . . total revenue
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To substitute for k, we solve the first equation for k:
k = 54 -a
Now, we substitute that into the second equation:
8a +5(54 -a) = 360
3a = 90 . . . . . . . . . . . subtract 270 from both sides; collect terms
a = 30 . . . . . . . . . . . . divide by 3
k = 54 -30 = 24 . . . . . use the above formula for k
The number of kids was 24; the number of adults was 30.